Global electricity generation from nuclear dropped 7% in 2012 and is down nearly 12% from 2006’s peak of 2,660 TWh, according to the World Nuclear Industry Status Report 2013, which was published Thursday.

The report, published by Mycle Schneider Consulting, looks at nuclear reactor units in operation and under construction.

As of July 1, 427 reactors were in operation across 31 countries around the world, with a combined installed capacity of 364 GW.

Global nuclear capacity peaked in 2010 at 375 GW, the report said, while reactor numbers peaked in 2002 at 444.